Job Complexity and Difficulty

[Aravell]

Or people don't want to spend over twice as long in a dungeon because someone doesn't know how to press their combos or cooldowns.

I actually went to check logs on this point to check if this was true.

In the latest dungeon (Underkeep), the fastest time achieved by a roulette-mandated light party comp is 11 minutes, so the average clear time in DF would be 14-15 minutes. I found a log with 2 grey DPS jobs, they took 19 minutes.

You'd probably lose as much time to having 1 grey DPS job as you would by having BRD+DNC comp or having a single pulling tank. It's really not that serious.